Vulnerability-Lookup

FKIE_CVE-2026-90274

Vulnerability from fkie_nvd - Published: 2026-09-17 17:17 - Updated: 2026-09-17 17:17

Severity

Summary

In the Linux kernel, the following vulnerability has been resolved: coresight: etm4x: fix underflow for usage of (nrseqstate - 1) According to IHI006H Embedded Trace Macrocell Architecture Specification[0], TRCSEQEVR<n> is implemented only when TRCIDR5.NUMSEQSTATE is 0b100, in which case n ranges from 0 to 2; otherwise, TRCIDR5.NUMSEQSTATE is 0b000. IOW, the number of usage in the initialisation or setting TRCSEQEVR<n> with drvdata->nrseqstate - 1 in the loop could make underflow issue when TRCIDR5.NUMSEQSTATE is 0b000. Therefore, introduce nr_seq_ctrls field and untie it from nrseqstate. As part of this introduce ETM_MAX_SEQ_TRANSITIONS macro and apply nr_seq_ctrls and above macro to TRCSEQEVR<n> relevant fields setup.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1674d9bff8073bdee5dbc200f56fc3caa28d0566
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1ade9a335c69fc735cb7b3f222ed35ab135540fb
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/4091f2d5b26d117c992ffcce1a5df425a0daedcd
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/4f9a0f548413bf864f609c9f4bc56e3f1b3577d4
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5ac900f73ce1d4d8308f40752b51bc8a02b244d2
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8d669db59f7283b838e029af29da12e505265fae
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/be7b2de5b9a96ae68ffa3528e0a40d63e0fd8148

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/hwtracing/coresight/coresight-etm4x-cfg.c",
            "drivers/hwtracing/coresight/coresight-etm4x-core.c",
            "drivers/hwtracing/coresight/coresight-etm4x-sysfs.c",
            "drivers/hwtracing/coresight/coresight-etm4x.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "8d669db59f7283b838e029af29da12e505265fae",
              "status": "affected",
              "version": "2e1cdfe184b5202d51e0611d7a051e2bea303946",
              "versionType": "git"
            },
            {
              "lessThan": "4091f2d5b26d117c992ffcce1a5df425a0daedcd",
              "status": "affected",
              "version": "2e1cdfe184b5202d51e0611d7a051e2bea303946",
              "versionType": "git"
            },
            {
              "lessThan": "be7b2de5b9a96ae68ffa3528e0a40d63e0fd8148",
              "status": "affected",
              "version": "2e1cdfe184b5202d51e0611d7a051e2bea303946",
              "versionType": "git"
            },
            {
              "lessThan": "4f9a0f548413bf864f609c9f4bc56e3f1b3577d4",
              "status": "affected",
              "version": "2e1cdfe184b5202d51e0611d7a051e2bea303946",
              "versionType": "git"
            },
            {
              "lessThan": "1ade9a335c69fc735cb7b3f222ed35ab135540fb",
              "status": "affected",
              "version": "2e1cdfe184b5202d51e0611d7a051e2bea303946",
              "versionType": "git"
            },
            {
              "lessThan": "5ac900f73ce1d4d8308f40752b51bc8a02b244d2",
              "status": "affected",
              "version": "2e1cdfe184b5202d51e0611d7a051e2bea303946",
              "versionType": "git"
            },
            {
              "lessThan": "1674d9bff8073bdee5dbc200f56fc3caa28d0566",
              "status": "affected",
              "version": "2e1cdfe184b5202d51e0611d7a051e2bea303946",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/hwtracing/coresight/coresight-etm4x-cfg.c",
            "drivers/hwtracing/coresight/coresight-etm4x-core.c",
            "drivers/hwtracing/coresight/coresight-etm4x-sysfs.c",
            "drivers/hwtracing/coresight/coresight-etm4x.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.2"
            },
            {
              "lessThan": "4.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: etm4x: fix underflow for usage of (nrseqstate - 1)\n\nAccording to IHI006H Embedded Trace Macrocell Architecture\nSpecification[0], TRCSEQEVR\u003cn\u003e is implemented only when\nTRCIDR5.NUMSEQSTATE is 0b100, in which case n ranges from 0 to 2;\notherwise, TRCIDR5.NUMSEQSTATE is 0b000.\n\nIOW, the number of usage in the initialisation or setting\nTRCSEQEVR\u003cn\u003e with drvdata-\u003enrseqstate - 1 in the loop could make\nunderflow issue when TRCIDR5.NUMSEQSTATE is 0b000.\n\nTherefore, introduce nr_seq_ctrls field and untie it from nrseqstate.\nAs part of this introduce ETM_MAX_SEQ_TRANSITIONS macro and\napply nr_seq_ctrls and above macro to TRCSEQEVR\u003cn\u003e relevant fields setup."
    }
  ],
  "id": "CVE-2026-90274",
  "lastModified": "2026-09-17T17:17:23.997",
  "metrics": {},
  "published": "2026-09-17T17:17:23.997",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1674d9bff8073bdee5dbc200f56fc3caa28d0566"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1ade9a335c69fc735cb7b3f222ed35ab135540fb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4091f2d5b26d117c992ffcce1a5df425a0daedcd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4f9a0f548413bf864f609c9f4bc56e3f1b3577d4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5ac900f73ce1d4d8308f40752b51bc8a02b244d2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8d669db59f7283b838e029af29da12e505265fae"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/be7b2de5b9a96ae68ffa3528e0a40d63e0fd8148"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-90274 (GCVE-0-2026-90274)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:08 – Updated: 2026-09-17 16:08

Title

coresight: etm4x: fix underflow for usage of (nrseqstate - 1)

Summary

Severity

No CVSS data available.

Assigner

Linux mitre root

References

7 references

URL	Tags
https://git.kernel.org/stable/c/8d669db59f7283b83…
https://git.kernel.org/stable/c/4091f2d5b26d117c9…
https://git.kernel.org/stable/c/be7b2de5b9a96ae68…
https://git.kernel.org/stable/c/4f9a0f548413bf864…
https://git.kernel.org/stable/c/1ade9a335c69fc735…
https://git.kernel.org/stable/c/5ac900f73ce1d4d83…
https://git.kernel.org/stable/c/1674d9bff8073bdee…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 2e1cdfe184b5202d51e0611d7a051e2bea303946 , < 8d669db59f7283b838e029af29da12e505265fae (git) Affected: 2e1cdfe184b5202d51e0611d7a051e2bea303946 , < 4091f2d5b26d117c992ffcce1a5df425a0daedcd (git) Affected: 2e1cdfe184b5202d51e0611d7a051e2bea303946 , < be7b2de5b9a96ae68ffa3528e0a40d63e0fd8148 (git) Affected: 2e1cdfe184b5202d51e0611d7a051e2bea303946 , < 4f9a0f548413bf864f609c9f4bc56e3f1b3577d4 (git) Affected: 2e1cdfe184b5202d51e0611d7a051e2bea303946 , < 1ade9a335c69fc735cb7b3f222ed35ab135540fb (git) Affected: 2e1cdfe184b5202d51e0611d7a051e2bea303946 , < 5ac900f73ce1d4d8308f40752b51bc8a02b244d2 (git) Affected: 2e1cdfe184b5202d51e0611d7a051e2bea303946 , < 1674d9bff8073bdee5dbc200f56fc3caa28d0566 (git)
Linux	Linux	Affected: 4.2 Unaffected: 0 , < 4.2 (semver) Unaffected: 5.15.221 , ≤ 5.15.* (semver) Unaffected: 6.1.188 , ≤ 6.1.* (semver) Unaffected: 6.6.157 , ≤ 6.6.* (semver) Unaffected: 6.12.110 , ≤ 6.12.* (semver) Unaffected: 6.18.52 , ≤ 6.18.* (semver) Unaffected: 7.2.6 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/hwtracing/coresight/coresight-etm4x-cfg.c",
            "drivers/hwtracing/coresight/coresight-etm4x-core.c",
            "drivers/hwtracing/coresight/coresight-etm4x-sysfs.c",
            "drivers/hwtracing/coresight/coresight-etm4x.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "8d669db59f7283b838e029af29da12e505265fae",
              "status": "affected",
              "version": "2e1cdfe184b5202d51e0611d7a051e2bea303946",
              "versionType": "git"
            },
            {
              "lessThan": "4091f2d5b26d117c992ffcce1a5df425a0daedcd",
              "status": "affected",
              "version": "2e1cdfe184b5202d51e0611d7a051e2bea303946",
              "versionType": "git"
            },
            {
              "lessThan": "be7b2de5b9a96ae68ffa3528e0a40d63e0fd8148",
              "status": "affected",
              "version": "2e1cdfe184b5202d51e0611d7a051e2bea303946",
              "versionType": "git"
            },
            {
              "lessThan": "4f9a0f548413bf864f609c9f4bc56e3f1b3577d4",
              "status": "affected",
              "version": "2e1cdfe184b5202d51e0611d7a051e2bea303946",
              "versionType": "git"
            },
            {
              "lessThan": "1ade9a335c69fc735cb7b3f222ed35ab135540fb",
              "status": "affected",
              "version": "2e1cdfe184b5202d51e0611d7a051e2bea303946",
              "versionType": "git"
            },
            {
              "lessThan": "5ac900f73ce1d4d8308f40752b51bc8a02b244d2",
              "status": "affected",
              "version": "2e1cdfe184b5202d51e0611d7a051e2bea303946",
              "versionType": "git"
            },
            {
              "lessThan": "1674d9bff8073bdee5dbc200f56fc3caa28d0566",
              "status": "affected",
              "version": "2e1cdfe184b5202d51e0611d7a051e2bea303946",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/hwtracing/coresight/coresight-etm4x-cfg.c",
            "drivers/hwtracing/coresight/coresight-etm4x-core.c",
            "drivers/hwtracing/coresight/coresight-etm4x-sysfs.c",
            "drivers/hwtracing/coresight/coresight-etm4x.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.2"
            },
            {
              "lessThan": "4.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.221",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.188",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.157",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.110",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.52",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.6",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: etm4x: fix underflow for usage of (nrseqstate - 1)\n\nAccording to IHI006H Embedded Trace Macrocell Architecture\nSpecification[0], TRCSEQEVR\u003cn\u003e is implemented only when\nTRCIDR5.NUMSEQSTATE is 0b100, in which case n ranges from 0 to 2;\notherwise, TRCIDR5.NUMSEQSTATE is 0b000.\n\nIOW, the number of usage in the initialisation or setting\nTRCSEQEVR\u003cn\u003e with drvdata-\u003enrseqstate - 1 in the loop could make\nunderflow issue when TRCIDR5.NUMSEQSTATE is 0b000.\n\nTherefore, introduce nr_seq_ctrls field and untie it from nrseqstate.\nAs part of this introduce ETM_MAX_SEQ_TRANSITIONS macro and\napply nr_seq_ctrls and above macro to TRCSEQEVR\u003cn\u003e relevant fields setup."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-17T16:08:07.269Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/8d669db59f7283b838e029af29da12e505265fae"
        },
        {
          "url": "https://git.kernel.org/stable/c/4091f2d5b26d117c992ffcce1a5df425a0daedcd"
        },
        {
          "url": "https://git.kernel.org/stable/c/be7b2de5b9a96ae68ffa3528e0a40d63e0fd8148"
        },
        {
          "url": "https://git.kernel.org/stable/c/4f9a0f548413bf864f609c9f4bc56e3f1b3577d4"
        },
        {
          "url": "https://git.kernel.org/stable/c/1ade9a335c69fc735cb7b3f222ed35ab135540fb"
        },
        {
          "url": "https://git.kernel.org/stable/c/5ac900f73ce1d4d8308f40752b51bc8a02b244d2"
        },
        {
          "url": "https://git.kernel.org/stable/c/1674d9bff8073bdee5dbc200f56fc3caa28d0566"
        }
      ],
      "title": "coresight: etm4x: fix underflow for usage of (nrseqstate - 1)",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90274",
    "datePublished": "2026-09-17T16:08:07.269Z",
    "dateReserved": "2026-09-11T19:38:34.797Z",
    "dateUpdated": "2026-09-17T16:08:07.269Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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FKIE_CVE-2026-90274

CVE-2026-90274 (GCVE-0-2026-90274)

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Sightings

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